Specification Sheet

The Broan Make-Up Air Damper used in conjunction with Broan

SmartSense

and select BEST

range hoods ensures proper ventilation

in the home by effectively balancing indoor air pressure only when air

is being exhausted.

• Air intake and exhaust are equalized

• Ventilation devices function properly

• Helps maintain the home’s integrity

• Enhances energy efﬁciency

• Forces warm/humid air into wall cavities, resulting in potential mold/

mildew and structural issues

• Unconditioned and typically uncontrolled air is pushed into the home,

resulting in increased energy costs

Effects of Positive Air Pressure (supply systems)

• Exhaust fans unable to work at full, rated capacity

• Unconditioned and typically uncontrolled air is pulled into the home,

resulting in increased energy costs

• Draws hot/humid air inside, causing mold/mildew and structural

damage

Effects of Negative Air Pressure (exhaust systems)

Optimal Balanced Air Pressure

Causes of Unbalanced Air Pressure

Supply ventilation systems push air into the home causing positive pressure.

Conversely, when ventilation fans and range hood fans exhaust stale/polluted indoor

air to the outside, negative air pressure develops unless the exhausted air is replaced

by fresh outdoor air.